I don’t know what a .webp file is but I don’t like it. They’re like a filthy prank version of the image/gif you’re looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.
I have since tailored my app choice for webp so unsure nowadays, but my experience was that Windows photos could not open them, Photoshop requires a plugin, websites don’t allow uploading them, the list went on. I love webp but the application support has been (or was) abysmal for years.